import machine

def noop(*argv,**kw):pass

class bus:
    i2c= None

def i2c(scl=15,sda=4,freq=100000):
    global i2c
    bus.i2c = machine.I2C(scl=machine.Pin(scl), sda=machine.Pin(sda), freq=freq)
    print("i2c","scl",scl,"sda",sda,"freq",freq)
    del i2c

